Mining machine



F. W. VODOZ MINING MACHINE Original Filed Dec. 28. 1928 5 Sheets-Sheet;l

F. W. VODOZ MINING MACHINE Dec. 5, 1933.

Original Filed Dec. 26. 1928 5 Sheets-Sheet 2 m e i F. w. VODOZ1,937,737

MINING MACHINE Original Filed Dec. 26, 1928 5 Sheets-Sheet 3 Dec. 5,1933.

Dec. 5, 1933. VQDOZ 1,937,737

MINING MACHINE Original Filed Dec. 26, 1928 5 Sheets-Sheet 4 F. W. VODOZMINING MACHINE Dec. 5, 1933.

Original Filed Dec. 26, 1928 5 Sheets-Sheet 5 Patented Dec. 5, 1933UNITED STATES I 1,931,737 MINING MACHINE Frederick W. vodozrwilmette,111., assignor to Goodman Manufactur'ng Company, Chicago,

111., a corporation of I.

.linois Application December 26, 1928. Serial No. 328,436. Renewed July28, 1932 Claims.

This invention relates to mining machines and more particularly tomachines of the mounted type having a projecting kerf cutting elementadjustable in varying positions relative to the main 5 frame for makingvarious cuts including top or bottom slabbing cuts or side shearingcuts.

A prior application, Serial Number 153,253, filed by me on December 8,1926, relates to a mining machine of the class described. This inventionis an improvement overmy prior invention in that I provide an improvedmeans for vertically raising and lowering my cutting element giving agreater range of adjustment thereof and provide a more simplifiedgearing arrangement than is shown in my prior application.

Other objects of the invention will appear from time to time as thespecification proceeds.

The invention may be best understood with reference to the accompanyingdrawings wherein:

Figure 1 is a side View of the machine showing the cutter bar disposedat the opposite side and projecting forwardly from said machine,indicating bydotted lines certain other permissible positions of saidcutter bar;

Figure 2 is an enlarged plan view of the machine main body with partsbroken away and in section to more clearly show the details of myinvention;

Figure 3 is an enlarged vertical longitudinal section of the cuttingelement of the machine;

Figure 4 is an enlarged side view of the machine main body with partsbroken away and in section to more clearly show the means forverticallymoving the cutting element in its guides;

and

Figure 5 is an enlarged plan view of the machine truck with parts brokenaway and in section to more clearly show the truck driving means and thedriving means for vertically moving the cutting elementlin its guides. Ii 7 Like numerals refer to like parts throughout the various figures-Referring now to the details shown in the drawings, the main elements ofthe machine include a cutting element generally indicated at I mountedon guide members 2, 2, extending vertically upward from a base frame 3so said cutting element may be moved vertically in said guides withrespect to said base frame. Thebase frame 3 is mounted on a pair ofcontinuous tread mechanisms 4, 4, for moving the machine from place toplace andin and out of cutting position, which continuous treadmechanisms are interchangeable with a set of track guided supportingwheels 5, 5.

Referring now in particular to the cutting element 1, said cuttingelement includes a main body portion 6, a cutterhead generally indicatedat 7 projecting forwardly from said body portion and rotatably movableabout a longitudinal axis with respect thereto and a cutter bar 8projecting forwardly from said head and pivotally movable in aplaneparallel to the axis of rotation of said head. The cutter bar 8 carriesan endless cutter chain 9 of the usual form adapted to ride in suitableguides 10 formed about the sides and end of said cutterbar in theusualmanner. Referring in particular to Figure 1 it may be seen that the"cutter bar 8 may be bodily rotatedrelative tothe main body portion 6 onan axis exten'dinglongitudinally of the latter and may be rotated on anaxis perpendicular to said longitudinal axis as indicated by dottedlines in said figure to cut in various planes with respect to said bodyportion. The main bearings for the cutter head! comprise a cylindricalneck 14 journaled in a bearing g 15 formed at the front end of the mainbody portion 6 and an auxiliarybearing member 16 journaled in acylindrical outboard bearing support or ring 17 connected to themainbody portion 6 by a suitable rigid frame member 18 as is best shown inFigures 1, 2 and 4. The main cutter head bearings 15 and 17 arepreferably oftthe split type; as for instance, being divided on a.horizontal plane so as to comprise base members 15a. and 17a with theirrespective cap members 15b and 17b, respectively. Said bearings 15 and1'7 together form in effect trunnions for thecu tter head '7 disposedforwardly and rearwardly of the point of connection of the cutter bar 8to said cutter head. i i i A cutter bar supporting member 19 is mountedon the cutter head '7 midway between the cutter head bearings 15 and 17to rotate on an axis perpendicular to the longitudinalaxis of the cutterhead 7 and has the cutter bar8'fixed thereto by any suitable means wellknown to the art. A segment of a gear 20 is fixed to the cutterbarsupporting member 19 and projects forwardly therefrom. A pinion 21 on atransverse shaft 22 meshes withthe gear segment 20 for moving said gearsegment and the cutter bar supporting member 19 about its pivotal axis.The shaft 22 and pinion 21 are driven from a motor 23 on the rearwardend of the body portion 6 through a suitable system of gearing whichwill hereinafter be de- The cutter chain 9 isdriven by. a sprocket 24 onthe outer end of a shaft25 journaled within the cutter bar supportingmember 19'an'dcoaxial with the axis of rotation of said cutter barsupporting member. A bevel gear 28 is keyed near the inner end of theshaft and meshes with a bevel pinion 30 on a shaft 32 extendinglongitudinally of the body portion 8 and coaxial with the pivotal axisof the cutter head 7 so the sprocket 24 may be driven from the shaft 32in all positions of the cutter head 7 and cutter bar 8 with respect tothe body portion 6. 1

The shaft 32 has a sleeve 33 thereon extending substantially the lengthof said shaft which is journaled in ball bearings generally indicated at34 in the body portion 6 and cutter head 7. A shaft 35 is coaxial withthe shaft 32 and abuts the rearward end of said shaft. The shaft 35 isjournaled in ball hearings in the body portion 6 and is driven by themotor 23 through a motor pinion 36 and spur gear 37 keyed to said shaft.Suitable clutch means are provided to operatively connect the shaft 35with the shaft 32. Said clutch means is herein shown as a jaw clutch andcomprises a member 39 feathered on the shaft 35 having clutch jaws 40thereon which may engage clutch jaws 41 on a member i2 keyed on therearward end of the shaft 32. A suitable system of levers of the usualtype (not shown) is provided to slide the member 39 along the shaft 35to engage the clutch jaws i0 With the clutch jaws 41 to drive the shaft32 from the shaft 35 and thus drive the cutter chain 9 about the cutterbar 8 in the guides 10 in all positions of the cutter head 7 and cutterbar 8 with respect to the body portion 60f the mining machine.

The driving connection from the motor 23 to the pinion 21 for rotatingthe gear segment 20 and cutter bar 8 about the axis of said gear segmentincludes a gear 45 which is driven by the gear 37 and which is keyed ona longitudinal shaft 45 journaled in the body portion 6. Bevel pinions.47 and 48 are freely mounted on the shaft 46 and mesh with oppositesides of a bevel gear 49 for driving said bevel gear in oppositedirections when either of said bevel pinions are operatively oonnectedtothe shaft 46. Jaw vciutch means are provided to driveeither of the bevelpinions 47 or 48 from the longitudinal shaft 46. Said jaw clutch meansherein comprises a clutch collar 50 feathered on the shaft 46 havingclutch jaws on each end thereof engageable with either clutch jaws 51on' the bevel pinion 47 or clutch jaws 52 on the bevel pinion 48 so thateither of said bevel pinions maybe driven from the shaft 46 to provideameans for reversing the direction of rotation of 'the bevel gear 49. Theclutch collar 50 is'moved'along' the shaft 45 by a suitable system oflevers. of the ordinary type (not shown). The bevel gear 49 drives'atransverse shaft 58 having a worm 54 integral therewith. The worm 54meshes with and drives a worm gear 55 keyed on a sleeve 56 freelymounted on a sleeve 57 which in turn is keyed to the longitudinal sleeve33 on the longitudinal shaft 32. One side of the worm gear 55 bearsagainst a collar 58 threaded on the sleeve 57 while the opposite side ofsaid'worm gear bears against a flange 60 integral with the sleeve 56.

63 with the clutch jaws 61 so the sleeve 33 may be selectively drivenfrom the worm gear 55.

A spur gear 65 is keyed on the forward end of the sleeve 33 and mesheswith and drives a spur gear 66 on a longitudinal shaft 67 journaled inthe cutter head 7. A worm 68 is provided on the forward end of thelongitudinal shaft 67 and meshes with and drives a worm gear 69 on atransver e shaft 70. A pinion 71 is keyed to the shaft and meshes withand drives a spur gear 75 freely mounted on the transverse shaft 22. Aclutch member 76 affords selective connection between the gear '75 andthe shaft 22 as described. Rotation of the transverse shaft 22 rotatesthe pinion 21 and gear segment 20 about the axis of the cutter barsupporting member 19 to pivotally move the cutter bar 8 about the axisof said gear segment and the cutter bar supporting member 19. It willnow be seen that the cutter bar 8 may be pivotally swung by power in anyplane in which said cutter bar may be positioned, there being sufiicientclearance at the front end of said machine for said cutter bar to swingthrough an angle of approximately 180 degrees.

Thus, when the cutter head is rotated so the cutter bar is disposed in asubstantially horizontal plane, either above or below the center of theaxis of rotation of the cutter head (as shown by dotted lines inFigure 1) said cutter bar may be swung either to one side or the otherof the machine so as to make an arcuate cut in advance of the machine,or if desired the cutter bar may be held in a fixed position to one sideof the machine, and the entire machine be moved along the side of aWorking face in a mine wall so as to make a slabbing cut therein. Forthis latter purpose the worm G8 and worm gear 69 are of the self lockingtype, that is to say, the pitch of said worm and worm gear is such as tolock the cutter arm in any position to which it may be moved; as, forinstance, when the cutter is positioned for making a lateral or slabbingcut as above illustrated.

A spur gear 77 is loosely mounted on the transverse shaft 53 and hasselective connection therewith through a clutch member 78. The clutchmember 78 has a plurality of pins 79, 79, therein engageable with aplurality of apertures 80, 80, in the face of the spur gear 77. The endsof the pins 79 are beveled and the apertures 80 are correspondinglyshaped so as to receive the beveled ends of said pins. The angles ofincidence of the apertures 80, 80, are such that the clutch member 78will be disengaged from the gear 77 upon overload of said gear. The spurgear 77 drives a spur gear 81 keyed on a shaft 82. A worm 83 is integralwith said shaft anddrives a worm gear 84 keyed on a sleeve 85 coaxialwith the longitudinal shaft 32. The sleeve 85 is feathered on a sleeve36 which is slidably mounted on the sleeve 33 for rotatable movementthereon. I

A gear 87 is keyed on the sleeve 85 and is driven therefrom. Said gearserves as a sun gear of a planetary reduction gearing device and meshes'with and drives planetary pinions 88 rotatably mounted on shafts 89fixed in a cage 90 which is rotatable within a casing 91 for saidplanetary reduction gearing device. The casing 91 is keyed to the innerportion of the housing of the main body portion 6 and has an internalgear 92 on its inner periphery. The planetary pinions 88 mesh With saidinternal gear and rotate aboutsaid internal gear on rotation of the sungear 87 and cause the cage to rotate therewith. Planetary vpinions 93are freely mounted on. shafts 94 fixed on the cage 90 and are forwardlyof the planetary pinions 88 so as. to mesh with a sun gear 95 keyed tothe sleeve 85 and adjacent the forward portion of the sun gear 87 and aninternal gear 96 on the inner periphery of a casing 97. The sun gear95is of the same pitch and has the same number of teeth as the sun gear 87so the planetary pinions 93 will drive the internal gear 96 on rotationofthe sun gear 95 and the cage 90. A member 98 abuts the forward portionof the casing 97 and is fixed thereto so as to rotate therewith. Themember 98 has a plurality of clutch jaws 99 depending from its innerperiphery engageable with clutch jaws 100 on a collar 101 rotatable onthe sleeve 86 and movable with said sleeve as said sleeve is movedlongitudinally along the sleeve 33. The clutch jaws 100 are engageablewith clutch jaws 102 depending from a member 103 keyed within the cutterhead 7 for rotating said cutter head upon rotation of the internal gear96.

The clutch jaws 100 are engaged with or disengaged from the clutch jaws102 by longitudinal movementofthe sleeve 86. Clutch jaws 104 areprovided on the forward portion of the sleeve 86 and are engageable withthe clutch jaws 102 on 'the member 103 .for rotating the cutter head 7at the speed of rotation of the worm gear 84. The sleeve 86 is movedreciprocably along the sleeve 33 to engage either the clutch jaws 100 or104 with the clutch jaws 102 to rotate the cutter head 7 at either afast or slow speed by means of a clutch collar 105 threaded on therearward portion of the sleeve 86 and a suitable system of levers of theordinary type (not shown). In order to lockthe cutter head 7 in anydesired position of adjustment thereof either the clutch jaws 100 or 104must engagewith the clutch jaws 102. The worm 83 and wormgear 84 are ofthe self locking type to prevent rotation of the cutter head 7 when theclutch member 78 is disconnected from the gear 77 and either the clutchjaws 100 or 104 are in engagement with the clutch jaws 102.

It may be here seen that the cutter bar 8 may be moved aboutthelongitudinal axis of the cutter head 7 at a relatively highrate ofspeed to quickly adjust said cutter bar to its various desired cuttingpositions as is illustrated in Figure 1 or at a slow or feeding speedwhen it is desired to make an arcuate cut in a mine wall as is fullydescribed in my prior application, Serial Number 153,253, filed December8, 1926.

ily be disassembled and which occupies a minimum amount of space bothlaterally and vertically.

, The cutting element 1 isvertically adjusted in the guide members 2(See Figures 1 and 4) by means of vertically disposed shafts 107,107, oneach side of the body portion 6 which are threaded through blocks 108,108, held from vertical movement in guides 109, 109, integral with thebody portion 6 of the cutting element 1. The

of said shafts has a worm gear keyed thereto. Worms 111, 111, on atransverse shaft 112 mesh with and drive said worm gears. The shaft 112may be driven in opposite directions from a motor 113 on the rearwardportion of the base frame 3 (see Figure 5) by means of a motor shaft114, universal joint 115, connecting shaft 116, universal joint 117,shaft 118, bevel, gear 119, bevel gears 120, 120, and clutch members121, 121. The bevel gears 120, 120, are driven in opposite directions bymeans of the bevel gear 119 and are selectively connectible with theshaft 112 to drive said shaft in opposite directions and thus raise orlower the cutting element 1 in the guide members 2, 2, by means of theclutch members 121, 121, which are connected together so one clutchmember 121 is disengaged from its bevelgear 120 when the opposite clutchmember 121 is engaged with its respective bevel gear 120. V

The continuous treads 4, 4 are driven from the motor 113 by means of amotor pinion 123 keyed on the motor shaft 114 which meshes ,100 with anddrives spur gears 124, 124, freely mounted on shafts 125, 125, on eachside of the motor shaft 114. The spur gears 124, 124, are selective- 1yconnectible with the shafts 125, 125, by means of clutch members 126,126. The clutch members 105 126 may be of any well known type but areherein shown as pin clutches, the angle of incidence of the pins andapertures into which said pins fit being such that said clutches willslip and disconnect the shafts 125, 125, from the spur 1 10 gears 124,v124, upon overload of said shafts. Worms 127, 127, are integral with theshafts 125, and drive worm gears 128, 128, on transverse stub shafts129, 129. A spur gear 130 is keyed to each stub shaft 129. The spurgears 130, 130, mesh with spur gears 131, 131, keyed on shafts 132, 132.Sprockets 133, 133, are keyed to said shafts and drive the continuoustreads 4, 4. The continuous treads 4, 4, are threaded over the drivingsprockets133, 133, on the rearward portion of the machine and sprockets134, 134, keyed on shafts 135, 135, on the forward portion of the baseframe 3 for driving said shafts. The clutch members 126, 126, areoperable independently of each other by means of a suitable system oflevers of the ordinary type so that both of -the continuous treads 4 maybe driven simultaneously to drive the mining machine in a straight lineor so that powermay be released from one or the other of said continuoustreads to turn the mining machine in one direction or the other. Shafts132, 132, and 135, 135, project beyond the sides of the base frame 3 sothat track wheels 5, 5, may be inserted thereon if desired.

The:use and operation of the machine above described willnow be clear toone familiar with the art. The machine may be used for making anordinary shearing .cut at either side of the machine or in making anoverhead arching cut when advancing tunnels or main entries as is fullydisclosed in my prior application, Serial Number 153,253, filed December8, 1926. This cut consists of a shearing out from the floor at one sideof the machine to a position substantially in the same horizontal planeas the axis of rotation of the cutter head. From this position thecutter bar is locked in a stationary position and the cutter head isrotated about an arc to a position on the opposite side of the machinefrom the initial shearing cut and a shearing cut is made from thisposition to the mine floor. This leaves a kerf in the form of an arc thecore of which may be removed by the usual mining methods. The machinemay also be used in over cutting or under cutting, or in making aslabbing out at various heights in a mine wall. These various cuts beingproduced either by maintaining the machine frame stationary and swingingthe cutter bar about its axis, or by positioning the cutter bar in afixed position and feeding said bar by advancing the machine bodilyalong the track or mine bottom or by a combination of each of these metleds. The various feeding operations above described are well known tothe art, vertical adjustment of the cutting element being obtained byvertically moving the cutting element 1 in its guide members 2, 2..

.'Although I have herein shown and described one form in which myinvention may be embodied, I do not wish to limit myself tothe preciseconstruction and arrangement of parts shown, it being understood thatalterations or changes may be made without departing from the spirit andscope of my invention. Furthermore, I do not wish to be construed aslimiting myself to the particular embodiment illustrated, excepting asit may be limited in the appended claims.

I claim as my invention:

1. In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar offset from said cutter head and mounted for pivotal swingingmovement in planes substantially parallel with the axis of rotation ofsaid cutter head, supporting means for said cutter head including abearing spaced from said body portion and beyond the point of connectionof said cutter bar to said cutter head, a motor on said body portion,and coacting power means for rotating said cutter head and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead, said power means being carried on a single shaft extendinglongitudinally of said machine. i

:3. In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar having a cutter chain movable thereabout, said cutter bar beingoffset from said.

cutter head and mounted for pivotal swinging movement in planessubstantially parallel with the of rotation of said cutter head, a motoron said body portion, and coacting power means for driving said cutterchain, rotating said cutter head, and swinging cutter bar in a planeparallel to the of rotation of said cutter head including alongitudinally extending shaft on the axis of rotation of said cuterhead, a sleeve rotatable about said shaft and a planetary gearedreduction device rotatable about said sleeve and independent of saidsleeve.

3. In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar having a cutter chain movable thereabout, said cutter bar beingoffset from said cutter head and mounted for pivotal swinging movementin planes substantially parallel with the axis of rotation of saidcutter head, a motor on said body portion, and coacting power means fordriving said cutter chain, rotating said cutter head, and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a horizontal shaft connectible with said motor, a shaftabutting said first mentioned shaft and selectively connectibletherewith, said power means for driving said cutter chain, rotating saidcutter head and swinging said cutter bar in a plane parallel to the axisof rotation of said cutter head being coaxial with said last mentionedshaft.

4. In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar having a cutter chain movable" thereabout, said cutter bar beingoffset from said cutter head and mounted for pivotal swinging movementin planes substantially parallel with the axis of rotation of saidcutter head, a motor on said body portion, and coacting power fordriving said cutter chain, rotating said cutter head, and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a horizontal shaft connectible with said motor, a shaftabutting said first mentioned shaft and selectively connectibletherewith, said power means for driving said cutter chain, rotating saidcutter head and swinging said cutter bar in a plane parallel to the axisof rotation of said cutter he d bein coaxial with said last mentionedshaft and operable independently of each other.

5. In a mining machine, a base frame, a motor on said base frame, aplurality of continuous tread devices for supporting and moving saidbase frame about a mine, means for driving said continuous tread devicesfrom said motor, a cutting element movable vertically with respect tosaid base frame, said means for vertically mov ing said cutting elementwith respect to said base frame being operably connected with saidmotor, said cutting element including a body portion, a cutter headrotatably mounted relative to said body portion, a cutter bar offsetfrom said cutter head and mounted for pivotal swinging move- .rent inplanes substantially parallel with the axis of rotation of said cutterhead, a cutter chain movable in guides on said cutter bar, a motor onsaid body portion, and coacting power means connectible with said motorfor rotating said cutter head, swinging said cutter bar in a planeparallel to the axis of rotation of said cutter head and driving saidcutter chain about said cutter bar including a horizontal shaft on theaxis of rotation of said cutter head and a planetary gear mechanismcoaxial with but independent of said shaft operatively connectible withsaid cutter head for rotating said cutter head.

6. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, supporting means for saidcutter head including a bearing spaced from said body portion and beyondthe point of connection of said cutter bar and said cutter head, a motoron said body portion, and ccacting power means for rotating said cutterhead and swinging said cutter bar in a plane parallel to the axis ofrotation of said outter head comprising a longitudinal shaft driven bysaid motor, a sleeve concentric with said shaft and driven by said motorindependently of said means shaft and another sleeve concentric withsaid shaft and driven by said motor independently of said firstmentioned sleeve.

'7. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relative to said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelWith the axis of rotation of said cutter head, a cutter chain movableabout said cutter bar, a motor on said body portion, and coacting powermeans for driving said cutter chain, rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head including a longitudinally extending shaft driven bysaid motor and having driving connection with said cutter chain, asleeve concentric with said shaft and driven by said motor independentof said shaft and having driving connection with said cutter bar forswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head and another sleeve concentric with said last mentionedsleeve and driven by said motor independently of said first mentionedsleeve for rotating said cutter head.

8. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a cutter chain movableabout said cutter bar, a motor on said body portion, and coacting powermeans for driving said cutter chain, rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head including a longitudinally extending shaft driven bysaid motor and having driving connection with said cutter chain, asleeve concentric with said shaft and driven by said motor independentof said shaft and having driving connection with said cutter bar forswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head, another sleeve concentric with said last mentionedsleeve, a planetary gearreduction mechanism, means for driving saidplanetary gear mechanism from said motor, means for connecting saidplanetary gear reduction mechanism with said cutter head for rotatingsaid cutter head at a predetermined low speed, and means for connectingsaid sleeve with said cutter head for rotating said cutter head at afaster speed. v

9. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, acutter chain movableabout said cutter bar, a motor on said body portion, and'coacting powermeans for driving said cutter chain, rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaidcutter head including a longitudinally extending shaft driven bysaid motor and having drivingrconnection with said cutter chain, asleeve concentric with said shaft and driven by said motor independentlyof said shaft and having driving connection with said cutter barforswinging said cutter bar in a planeparallel to the axis of rotation ofsaid cutter head, another sleeve concentric with said last mentionedsleeve, means for driving said sleeve from said motor, a planetary gearmechanism concentric with said sleeve, means for connecting saidplanetary gear mechanism with said cutter head for rotating said cutterhead at a predetermined low speed independently of said first mentionedsleeve and means for connecting said last mentioned sleeve with saidcutter head for rotating said cutter head at a higher speedindependently of said planetary gear mechanism.

10. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a cutter chain movableabout said cutter bar, a motor on said body portion, and coacting powermeans for driving said cutter chain, rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head including a longitudinally extending shaft driven bysaid motor and having driving connection with said cutter chain, asleeve'concentric with said shaft, drive connections from said motor tosaid sleeve for driving said sleeve independently of said shaft inreverse directions without reversal of said motor, and means forselectively connecting said sleeve with said cutter bar for swingingsaid cutter bar in reverse directions in a plane parallel to the axis ofrotation of said cutter head without reversal of said motor.

11. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a cutter chain movableabout said cutter bar, a motor on said body portion, and coactingpowermeans for driving said cutter chain, rotating-said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head including a longitudinally extending shaft driven bysaid'motor and having driving connection with said cutter chain, asleeve concentric with said shaft, drive connections from said motor tosaid sleeve for driving said sleeve independently of said shaft inreverse directions without reversal of said motor, another sleeveconcentric with said last mentioned sleeve, drive connections from saidmotor to said sleeve for driving said sleeve independently of said firstmentioned sleeve, and means for selectively connecting said cutter headwith said last mentioned sleeve for rotating said cut-' ter head inreverse directions without reversing said motor.

12. In a mining machine, a base frame, a"

cutting element on said base frame including a body portion, a cutterhead rotatably mounted relativeto said body portion, a cutter bar offsetfrom said cutter head and mounted for pivotal swinging movement inplanes substantially parallel with the axis of rotation of said cutterextending shaft driven by said motor and having driving connection withsaid cutter chain, a sleeve concentric with said shaft, driveconnections from said motor to said sleeve for driving said sleeveindependently of said shaft in reverse directions without reversal ofsaid motor, another sleeve concentric with said last mentioned sleeve,drive connections from said motor to said sleeve for driving said sleeveindependent 1y of said first mentioned sleeve, a planetary gearedreduction mechanism, and means for selectively connecting said cutterhead with said last mentioned sleeve or said planetary gear mechanismfor rotating said cutter head at a plurality of speeds in reversedirections without reversing said motor.

13. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a cutter chain movableabout said cutter bar, a motor on said body portion, and coacting powermeans for driving said cutter chain, rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head including a longitudinally extending shaft driven bysaid motor and having driving connection with said cutter chain, asleeve concentric with said shaft, drive connections from said motor tosaid sleeve for driving said sleeve independently of said shaft inreverse directions without reversal of said motor, another sleeveconcentric with said last mentioned sleeve, drive connections from saidmotor to said sleeve for driving said sleeve independently of said firstmentioned sleeve, a planetary geared reduction mechanism concentrictherewith, means for selectively connecting said cutter head with saidlast mentioned sleeve or said planetary geared reduction mechanism forrotating said cutter head at a plurality of predetermined speeds inreverse directions without reversing said motor and means forselectively connecting said first mentioned sleeve with said cutter barfor swinging said cutter bar in reverse directions without reversal ofsaid motor.

14. In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar offset from said cutter head and mounted for pivotal swingingmovement in planes substantially parallel with the axis of rotation ofsaid cutter head, supporting means for said cutter head including abearing spaced from said body portion and beyond the point of connectionof said cutter bar and said cutter head, a motor on said body portion,and coacting power means for rotating said cutter head and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a shaft extending longitudinally of said machine, asleeve coaxial therewith and driven from said motor in reversedirections Without reversal of said motor, a planetary gear mechanismcoaxial with said sleeve, means for driving said planetary gearmechanism from said motor in reverse directions without reversalof saidmotor, and means for selectively connecting said cutter head with saidplanetary gear mechanism for rotating said cut- ,ter head at apredetermined low speed in opposite directions without reversal of saidmotor.

15, In a mining machine, a base frame, a cutting element verticallymovable with respect to said base frame including a body portion, acutter head rotatably mounted relative to said body portion, a cutterbar offset from said cutter head and mounted for pivotal swingingmovement in planes substantially parallel with the axis of retation ofsaid cutter head, supporting means for said cutter head including abearing spaced from said body portion and beyond the point of connectionof said cutter bar and said cutter head, a motor on said body portion,and coacting power means for rotating said cutter head and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a shaft extending longitudinally of said machine, asleeve coaxial therewith and driven from said motor in oppositedirections without reversal of said motor, a planetary gear mechanismcoaxial with said sleeve, means for driving said planetary gearmechanism from said motor in reverse directions without reversal of saidmotor, means for selectively connecting said cutter head with saidplanetary gear mechanism for rotating said outter head at apredetermined low speed in opposite directions without reversal of saidmotor, and means for selectively connecting said sleeve with said cutterbar for swinging said cutter bar in opposite directions without reversalof said motor.

16. In a mining machine, a body portion, a cutter head rotatably mountedrelative to said body portion, a cutter bar offset from said cutter headand mounted for pivotal swinging movement in planes substantiallyparallel with the axis of rotation of said cutter head, a cutter chainmovable about said cutter bar, a motor, and coacting power means fordriving said cutter chain, rotating said cutter head, and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a shaft extending longitudinally of said machine andhaving driving connection with said cutter chain, a sleeve coaxialtherewith and driven from said motor independently of said shaft inopposite directions Without reversal of said motor, another sleevecoaxial with said aforementioned sleeve, a planetary gear reductionmechanism coaxial with said sleeve, and means for selectively connectingsaid cutter head with either said last mentioned sleeve or saidplanetary gear mechanism for rotating said cutter head at either a highor a slow feeding speed in opposite directions without reversal of saidmotor.

17. In a mining machine, a body portion, a cutter head rotatably mountedrelative to said body portion, a cutter bar offset from said cutter headand mounted for pivotal swinging movement in planes substantiallyparallel with the axis of retation of said cutter head, a cutter chainmovable about said cutter bar, a motor, and coacting power means fordriving said cutter chain, rotating said cutter head, and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead including a shaft extending longitudinally of said machine andhaving driv ing connection with said cutter chain, a sleeve coaxialtherewith and driven from said motor independently of said shaft inopposite directions without reversal of said motor, another sleevecoaxial with said aforementioned sleeve, a planetary gear reductionmechanism coaxial with said sleeve, and means for selectively connectingsaid cutter head with either said last mentioned sleeve 01 saidplanetary gear mechanism for rotating ,of said motor, and means forconnectingsaid first mentioned sleeve with said cutter bar for swingingsaid cutter bar in opposite directions without reversal of said motor.

18. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter bar supported by said body portion for rotation about an axis disposed substantially perpendicular tothe longitudinal axis of said body portion, a cutter chain movable aboutsaid cutter bar, a motor on said body portion, and coacting power meansfor rotating said cutter bar and driving said cutter chain from saidmotor comprising a longitudinal shaft driven by said motor and havingdriving connection with said cutter chain, a sleeve concentric with saidshaft, means for driving said sleeve from said motor independently ofsaid shaft including reverse gearing and a worm gear concentric withsaid sleeve, and a selective drive connection from said sleeve to saidcutter head including a geared reduction device arranged coaxially ofsaid sleeve.

19. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a motor on said bodyportion, and coacting power means forrotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head comprising a shaft extending longitudinally of saidbody portion driven by said motor, a sleeve concentric with said shaftand driven by said motor independent- 1y of said shaft, and anothersleeve concentric with said shaft and driven by said motor independentlyof said first mentioned sleeve.

20. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar mounted for pivotal swinging movementin planes substantially parallel with the axis of rotation of saidcutter head, a motor on said body portion, and coacting power means forrotating said cutter head and swinging said cutter bar in a planeparallel to the axis of rotation of said cutter head comprising a shaftextending longitudinally of said body portion driven by said motor, asleeve concentric with said shaft, means for driving said sleeve fromsaid motor independently of said shaft including reverse gearing andworm gear concentric with said sleeve, another sleeve concentric withsaid shaft and means for driving said second sleeve from said motorincluding re verse gearing and a planetary geared reduction device.

21. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar mounted for pivotal swinging movementin planes substantiah 1y parallel with the of rotation of said cutterhead, a motor on said body portion, and coacting power means forrotating said cutter head and swinging said cutter bar in a planeparallel to the axis of rotation of said cutter head comprising a shaftextending longitudinally of said body por tion driven by said motor, asleeve concentric with said shaft, means for driving said sleeve fromsaid motor independently of said shaft including reverse gearing and aworm gear concentric with said sleeve, a geared drive connection fromsaid sleeve to said cutter bar for swinging said cutter bar in a planeparallel to the axis of rotation of said cutter head including a shaftparallel with said sleeve, a worm thereon, a worm gear driven thereby, ageared connection from said Worm to said cutter head, another sleeveconcentrio with said shaft and driven by said motor and a selectivedrive connection from said sleeve to said cutter head for rotating saidcutter head about an axis disposed longitudinally of said base frame.

22. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar offset from said cutter head andmounted for pivotal swinging movement in planes substantially parallelwith the axis of rotation of said cutter head, a motor on said bodyportion, and coacting power means for rotating said cutter head andswinging said cutter bar in a plane parallel to the axis of rotation ofsaid cutter head comprising a shaft extending longitudinally of saidbody portion driven by said motor, a sleeve concentric with said shaft,means for driving said sleeve from said motor, a drive connection fromsaid sleeve to said cutter bar for swinging said cutter bar in a planeparallel with the axis of rotation of said cutter head, another sleeveconcentric with said shaft and driven by said motor, a sleeve mounted onsaid last-mentioned sleeve for free rotation with respect thereto and aselective drive connection from said sleeves to said cutter head forrotating said cutter head about an axis disposed longitudinally of saidbase frame at either a high or low speed.

23. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar mounted on said cutter head forpivotal swinging movement in planes substantially parallel with the axisof rotation of said cutter head, a motor on said body portion, andcoacting power means for rotating said cutter head and swinging saidoutter bar in a plane parallel to the axis of rotation of said cutterhead comprising a shaft extending longitudinally of said body portiondriven by said motor, a sleeve concentric with said shaft, means fordriving said sleeve from said motor, a drive connection from said sleeveto said cutter bar for swinging said cutter bar in a plane parallel withthe axis of rotation of said cutter head, another sleeve concentric withsaid shaft and driven by said motor, and a drive connection from saidsleeve to said cutter head for rotating said cutter head about an axisdisposed longitudinally of said base frame including a'planetary gearedreduction device.

24. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar mounted on said cutter head forpivotal swinging movement in planes substantially parallel with the axisof rotation of said cutter head, a motor on said body portion, andcoacting power means for rotating said cutter head and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead comprising a shaft extending longitudinally of said body portiondriven by said motor, a sleeve concentric with said shaft, means fordriving said sleeve from said motor, a geared lot drive connection fromsaid sleeve to said cutter bar for swinging said cutter bar in a planeparallel with the axis of rotation of said cutter head, another sleeveconcentric with said shaft, a sleeve mounted on said last-mentionedsleeve for free rotation with respect thereto, means for driving saidlast-mentioned sleeves from said motor including reverse gearing, and aselective driveconnection from said sleeves to said cutter head forrotating said cutter head about an axis disposed longitudinally of saidbase frame at either a high or low speed.

25. In a mining machine, a base frame, a cutting element on said baseframe including a body portion, a cutter head rotatably mounted relativeto said body portion, a cutter bar mounted on said cutter head forpivotal swinging movement in planes substantially parallel with the axisof r0- tation of said cutter head, a motor on said body portion, andcoacting power means for rotating said cutter head and swinging saidcutter bar in a plane parallel to the axis of rotation of said cutterhead comprising a shaft extending longitudinally of said body portiondriven by said motor, a sleeve concentric with said shaft, means fordriving said sleeve from said motor, a drive connection from said sleeveto said cutter bar for swinging said cutter bar in a plane parallel withthe axis of rotation of said cutter head, another sleeve concentric withsaid shaft, means for driving said second mentioned sleeve from saidmotor including reverse gearing, and a drive connection from said sleeveto said cutter head for rotating said cutter head about an axis disposedlongitudinally of said base frame including a planetary geared reductiondevice.

FREDERICK W. VODOZ.

